Improvement in screw-threaded wire for use in manufacture of boots and shoes



VAN WAGENEN Screw-Threaded Wire for use 'in Manufahturenf Boots and.Shpes,

4 f Gmwm Patented April 6,1875.

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UNITED STATES PATENT Orr'rce.

ALBERT VAN WAGENEN, OF BOSTON, MASSACHUSETTS.

IMPROVEMENT IN SCREW-THREADED WIRE FOR USE IN MANUFACTURE OF BUOTS ANDSHOES.

Specification forming part of Letters Patent No. 161,842, dated April 6,1875; application filed February 11, 1875.

To all whom it may concern Be it known that I, ALBERT VAN WAGENEN, ofBoston, Suffolk county, Massachusetts, have invented certain new anduseful Improvements in Screw-Threaded Vire for Use in the Mannfacture ofBoots and Shoes, of which the following is a specification, referencebeing had to the accompanying drawing. a

The article that I desire to secure by Letters Patent as a newmanufacture is a screwthreaded wire of indefinite length, having ascrew-thread of slight pitch and considerable depth, with the spacesbetween the spiral folds wider than the thread is thick.

The screw-thread is of slight pitch, so that when the wire is insertedin the sole it will not be liable thereafter to work its way into theinterior of the shoe. It is of considerable depth, so that it may beinserted in place by screwing the wire into the sole, incontradistinction to driving it by direct impact or pressure. The objectof spacing the spiral folds, as specified, is to give the wire moreholding power.

The wire is intended to, be used by taking it in the length, insertingone end in the sole, and screwing it into place, and then separatingthis inserted portion from the main length of wire by cutting off thewire close to the sole.

I am aware that machinery has heretofore been devised for cutting athread upon short lengths of wire, which were screwed into the shoeprogressively with the formation of the thread. This machinery at thebest operated imperfectly, and the method of manufacture which itinvolved was open to many serious objections, which prevented its use toany appreciable extent.

Under my invention, wire in perfect condition for screwing into the soleis furnished in long lengths, which are adapted to be used, without anypreliminary manipulation, in machinery for inserting screw-wire intoboots or shoes.

I am also aware that twisted wire, with a spiral or annular burr on itsexterior, and wire with a rounded thread of slight pitch and litthedepth, have been devised for use in the boot and shoe manufacture. Butall these wires are formed to be driven, and their structure is suchthat they are practically unavailable for use in any other way.Experience has demonstrated that wire tlrus formed and driven hascomparatively little Holding power, while Wire formed according to myinvention has great holding power, unexcelled indeed by any otherfastening, even including sewing.

A piece of wire made in accordance with my invention is represented inthe accompanying drawing. Such wire is made in long lengths, andsupplied to the market in coils.

What I claim, and desire to secure by Letters Patent, is

As a new article of manufacture, for use in the boot and shoemanufacture, the hereindescribed screw-threaded wire, made in longlengths, having a thread of slight pitch and considerable depth, as setforth.

In testimony whereof I have hereunto signed my name this 20th day ofJanuary, A. 1). 1575.

A. VAN WAGENEN.

Witnesses:

A. PoLLooK, EWELL A. DICK.

